#B73839#B73839

#B73839 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.9% C 0.163 H 24.3°. Best body text is #FFFFFF at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#B73839
RGB	rgb(183, 56, 57)
HSL	hsl(360, 53%, 47%)
HSV	hsv(360, 69%, 72%)
CMYK	cmyk(0%, 69.4%, 68.9%, 28.2%)
CIE-LAB	lab(43.05, 50.97, 28.91)
CIE-LCH	lch(43.05, 58.60, 29.56°)
OKLab	oklab(52.88% 0.149 0.0672)
OKLCH	oklch(52.88% 0.163 24.3)
XYZ	xyz(21.6835, 13.1942, 5.2751)
Luminance	0.1319 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B73839 #38B7B6

analogous

#B73878 #B73839 #B77738

triadic

#B73839 #39B738 #3839B7

tetradic

#B73839 #78B738 #38B7B6 #7738B7

square

#B73839 #78B738 #38B7B6 #7738B7

split-complementary

#B73839 #38B777 #3878B7

monochromatic

#591B1C #882A2A #B73839 #CE5E5F #DC8D8E

Accessibility & contrast

On white

5.77

#B73839 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#B73839 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B73839

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B73839	#FFFFFF	#000000	##FFFFFF
##B73839	1.00	5.77	3.64	5.77
#FFFFFF	5.77	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5438

Deuteranopia (green-blind)

#7B7035

Tritanopia (blue-blind)

#C9113A

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b73839;
/* rgb */ color: rgb(183, 56, 57);
/* oklch */ color: oklch(52.9% 0.163 24.3);

Tailwind

colors: {
  custom: {
    50: '#d4776f',
    500: '#b73839',
    950: '#000000',
  },
}

SCSS

$custom: #b73839;
$custom-light: #d4776f;
$custom-dark: #000000;

JSON

{
  "hex": "#b73839",
  "rgb": {
    "r": 183,
    "g": 56,
    "b": 57
  },
  "hsl": {
    "h": 359.528,
    "s": 53.138,
    "l": 46.863
  },
  "oklch": {
    "l": 0.52875,
    "c": 0.16349,
    "h": 24.3
  },
  "luminance": 0.13191
}

Semantic roles & 50–950 ramp

primary

#B73839

secondary

#84C7C6

accent

#DDDB4B

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B73839

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →